Service gateway



FIG. 1 is a front view of a service gateway in accordance with the present design,

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view 1 thereof;

FIG. 8 is a perspective view 2 thereof;

FIG. 9 is a perspective view 3 thereof; and,

FIG. 10 is a perspective view 4 thereof. 

CLAIM The ornamental design for a service gateway, as shown and described. 